I am thinking of doing electrics in a few weeks , running all my accessories off a leisure battery ,linked to main battery via a Digital relay. Will run the following off it: Main Stereo/Tablet for sat nav. USB/fag lighter charging points. Small inverter for mainly laptop / power tool charging. Rear led lights of some sort. Rear camera with monitor and front camera - potentially linked to a digital recorder . Anything else I think of But I would like an alarm , so am thinking I could get anyone as such and wire it from this battery. I know if it is done this way I can add as many sirens sensors etc and potentially paging system or/and GPS tracker . The negatives I guess are separate remote fob - don't care. No connection to indicators.- not a big concern if it beeps when armed. And if it has a immobilising circuit it won't be connected to vehicle- only worry. But is it likely to be robbed without a key anyway? Or should I just wedge out and get it fitted professionally and get a certificate for reduced insurance. Any thoughts?